Record Hatch completion

docs/plugin-host-model-completion-plan.md

@@ -4,7 +4,7 @@
 
 Build a general Python document model over the OCS host API for all **43 canvas kinds**. A kind is **complete** only after the per-kind gate below passes. Merely appearing in a converter or allowing a `layer` edit is partial coverage. Keep a property-level record of read/write, read-only, snapshot-only, and unsupported fields in the [43-kind coverage ledger](plugin-host-model-coverage-ledger.md). Do not resume the separate Lisp-to-Python conversion work.
 
-As of 19 September 2026, the current AttributeEntity increment is OCS commit `cf2a9235` on `plugin/host-model-api` and PandoraBox commit `9c6b5c3` on `main`. Host API is v7. The Python feature has explicit writes for **21 of 43** canvas kinds: 20 are creatable and `Insert` remains update-only. This is **not** 21 completed kinds: Tolerance, Shape and AttributeEntity pass every completion gate. AttributeDefinition passes its host and real IPC lifecycle but remains short of `Complete` because the pinned acadrust DXF reader drops optional ATTDEF fields. The other 22 canvas kinds have only `layer` writes through the document model. All 43 have raw typed snapshots. There are three internal records and two opaque fallbacks outside the 43 canvas kinds.
+As of 19 September 2026, the current Hatch increment is OCS commit `98b56ef6` on `plugin/host-model-api` and PandoraBox commit `a9b5de8` on `main`. Host API is v7. The Python feature has explicit writes for **22 of 43** canvas kinds: 21 are creatable and `Insert` remains update-only. This is **not** 22 completed kinds: Tolerance, Shape, AttributeEntity and Hatch pass every completion gate. AttributeDefinition passes its host and real IPC lifecycle but remains short of `Complete` because the pinned acadrust DXF reader drops optional ATTDEF fields. The other 21 canvas kinds have only `layer` writes through the document model. All 43 have raw typed snapshots. There are three internal records and two opaque fallbacks outside the 43 canvas kinds.
 
 Repositories:
 
@@ -93,7 +93,7 @@ The last five may require new engine capabilities rather than only Python conver
 
 ## Handoff start point
 
-Continue with **Hatch**. Build structurally valid solid and patterned hatch fixtures with closed boundaries, expose only fields whose mutations OCS can validate, and verify fill rendering, boundary integrity, deletion, undo/redo and both file formats through real IPC. AttributeDefinition remains mapped and integration-tested but open at W: pinned acadrust `568a12c` loses optional ATTDEF fields such as width factor on DXF read. Do not mark it complete until that dependency is fixed and the full property state passes DXF save/reopen. Keep the exact queue above and update statuses with evidence after each increment.
+Continue with **Leader**. Build a valid vertex path and annotation-linked fixture, map geometry separately from annotation/object handles, and verify path rendering, selection, reference preservation, deletion, undo/redo and both file formats through real IPC. AttributeDefinition remains mapped and integration-tested but open at W: pinned acadrust `568a12c` loses optional ATTDEF fields such as width factor on DXF read. Do not mark it complete until that dependency is fixed and the full property state passes DXF save/reopen. Keep the exact queue above and update statuses with evidence after each increment.
 
 ## Phase 8 progress log
 
@@ -115,3 +115,5 @@ Continue with **Hatch**. Build structurally valid solid and patterned hatch fixt
 - AttributeDefinition remains **Integration-tested / DXF blocked**, not Complete: acadrust `568a12c`'s ATTDEF DXF reader does not restore optional AcDbText fields including width factor. The real test and ledger record that exact W-gate gap. The queue now continues with `AttributeEntity`.
 - Closed `AttributeEntity` without flattening canonical drawing storage. V4 views and IPC snapshots expose each nested child by handle, while host create/update/delete and transactions rewrite the owning Insert so rendering, serialization and undo remain consistent.
 - `staged_python_attribute_entity_lifecycle_over_real_ipc` passes C/R/E/D/U/I/W/V/P with the actual v7 adapter. It creates a linked attribute from its block's ATTDEF, reads and edits value/placement/rotation, selects the parent Insert, renders text, rejects invalid tag/height/owner edits atomically, reopens edited and deleted state in DWG and DXF, and proves three-step undo/redo. AttributeEntity is **Complete**; the queue now continues with `Hatch`.
+- Completed `Hatch` with full solid/pattern definitions and typed nested boundary paths. The adapter generator now handles single-payload tagged enums as `{kind, value}` dictionaries, which covers every Hatch edge variant and is reusable by later nested entity models. Unknown adapter properties are rejected instead of being silently ignored.
+- `staged_python_hatch_lifecycle_over_real_ipc` passes C/R/E/D/U/I/W/V/P with closed line-loop fixtures: solid creation, conversion to a stored-line pattern, boundary replacement, selection and live render-cache checks, atomic invalid scale/association/open-loop/unmapped-payload rejection, edited/deleted DWG and DXF reopen, post-reopen edits, and three-step undo/redo. Hatch is **Complete**; the queue now continues with `Leader`.